Tool for chamfering leather straps



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UNITED STATES PATENT OFFICE.

JAMES BRIDGER, OF RIGHLAND, IOWA.

TOOL FOR CHAMFERING LEATHER STRAPS.

Specification of Letters Patent No. 21,937, dated November 2, 1858.

To all whom it may concern:

Be it known that I, JAMES BRIDGER, of Richland, in the county of Keokuk and State of Iowa, have invented a new and useful Tool for Ohamfering and Scoring Leather Straps; and I do hereby declare that the same is described and represented in the following specification and drawings.

To enable others skilled in the art to make and use my invention `I will proceed to describe its construction and operation referring to the drawings in which the same letters indicate like parts in each of the figures.

Figure l, is a top view of the tool open. Fig. 2, is a side elevation of the tool closed. Fig. 3, is the under side of the tool. Fig. 4, is a section on the line e, e, of Fig. l.

The nature of my invention consists in a groove in a block provided with chamfering and scoring knives, so arranged as to chamfer and score or channel the leather straps as they are drawn through the groove in the block.

In the accompanying drawing A, A', are the two blocks, made in the form shown in the drawing, to which the chamfering and scoring knives are fastened, as will be hereafter described. The block A, has a bracket B, fastened to its under side which is fitted to a mortise in the bench C, which may be considered as a portion of a harness makers bench; this bracket B, holds the block A, to the bench C, when placed in the mortise and the button D, turned over it. The block A', is fastened to the bracket E, by a screw arranged to traverse in the slot F, shown in Fig. 3, so that when the bracket E, is fastened in a mortise in the bench C, by the button G, the block A', can be traversed by turning the screw H, which turns freely in a plate fastened to the block A, and traverses the block A', by means of a nut fastened within it for that purpose. The block A, is connect-ed to the block A', by the bar I, which is fitted to traverse in the groove I', in the block A' as shown in Fig. 2. The block A, is also connected by the wide bar J, which is arranged to traverse in a recess in the block A', shown by dotted lines in Fig. l. The tops of the bars I, and J, are a little below the surface of the blocks A, and A', so as to form a groove K,`across the tool over the bars as shown in Figs. 2, and 4, for the leather strap to be drawn through when it is scored and chamfered.

The score K, may be adjusted to the width of the strap by turning the screw H, which traverses the block A'. The strap is pressed into the score K, while it is being drawn through it by the plate L, fastened to the springs M, M, which connect it to the top N, which top is connected to the block A', by the hinge O, and shown open or turned back in Fig. l, and closed in Fig. 2. The chamfering knives P, P, are shown in Fig. 5. Their cutting edges are made to project into the groove K, so as to chamfer the strap, as it is drawn through the groove. They are fastened to the blocks A, and A', by the screws Q, Q, which pass through the bar I, and through the slots in the knives and screw into the blocks, so as to clamp the knives fast to them. There is a recess cutin the under side of each block in which the scoring or channeling knives R, R, are fastened at an angle or in the position shown in sect-ion Fig. 4, by the screws S, S, which pass through the knives and screw into the blocks so that the points of the knives may be made to project more or less into the groove, so as to cut a channel or score the required depth in the strap drawn through the groove. There should be a recess'cut in the bench C, for the ends of the knives R, R, and screws S, S.

To chamfer and score a strap lay it into the groove K, and adjust the groove to the width of the strap by turning the screw H, then shut the top upon the strap and press it down with one hand and pull the strap through with the other, and if the knives are properly set, it will channel or score and chamfer the strap. If it is desirable to round the edges of a strap, all the knives may be removed, and some concave knives substituted instead of the knives P, P, so as to round the edges of a strap, when it is drawn through the groove as above described.

This tool is adapted to preparing leather for round reins and traces.

I believe I have described my invention so as to enable any person skilled in the art to make and use it.

I claim- The tool described for chamfering, and channeling leather straps as described.

JAMES BRIDGER.

lVitnesses:

J oHN IVAssoN, MARTHA J. VVAssoN. 

